Guides and tips

Learn why a black overlay may leave the original content intact, what true redaction changes, and how to review text layers, forms, attachments, and metadata before sharing a PDF.

A practical guide to lossy and lossless compression, choosing the right format, setting quality, and compressing images for free in your browser.

Compare compression, compatibility, encoding speed, transparency, and animation support, with clear recommendations for common use cases.

Learn why PDFs get large and compare compression, splitting, page removal, and resaving—all available locally in your browser for free.

Merge several PDFs, split by page or range, reorder pages, and extract or remove pages, with answers to common questions about order, bookmarks, and file size.

Understand pixels, DPI/PPI, display resolution, and file size, with recommended dimensions and workflows for avatars, covers, social media, and email.

A plain-language guide to Base64 encoding, why it adds about one-third to file size, where it is used, and why it is not encryption.

Turn photos, screenshots, or scans into a PDF, choose page size and orientation, sort pages, and understand A4 versus fit-to-image layouts.

Learn how DPI affects clarity and file size, when to choose PNG or JPG, and how to export selected pages locally without uploads.

Compare lossy and lossless compression, transparency, use cases, and file size, with practical advice for photos, screenshots, icons, and line art.